Spring Boot 소개 자료.

1. Spring Boot 소개
최범균, 2014-12-22

2. 웹 어플 만들때 필요한 것들 예시
• Maven
• Spring MVC
• JPA + Spring Data
• JSP
• MySQL
• Tomcat이나 Jetty로 테스트
• SLF4J + Logback
• JUnit, Spring Test
2

3. Boot 이전의 설정: 메이븐
<dependencies>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<ar:factId>jsp-­‐api</ar:factId>
<version>2.2</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<ar:factId>javax.servlet-­‐api</ar:factId>
<version>3.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<ar:factId>jstl</ar:factId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<ar:factId>spring-­‐webmvc</ar:factId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<ar:factId>spring-­‐orm</ar:factId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<ar:factId>hibernate-­‐en:tymanager</ar:factId>
<version>4.3.7.Final</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<ar:factId>spring-­‐data-­‐jpa</ar:factId>
<version>1.7.0.RELEASE</version>
</dependency>
<dependency>
<groupId>com.mchange</groupId>
<ar:factId>c3p0</ar:factId>
<version>0.9.2.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<ar:factId>mysql-­‐connector-­‐java</ar:factId>
<version>5.1.30</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<ar:factId>spring-­‐core</ar:factId>
<version>${spring.version}</version>
<exclusions>
<exclusion>
<groupId>commons-­‐logging</groupId>
<ar:factId>commons-­‐logging</ar:factId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<ar:factId>jcl-­‐over-­‐slf4j</ar:factId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<ar:factId>logback-­‐classic</ar:factId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<ar:factId>junit</ar:factId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<ar:factId>spring-­‐test</ar:factId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<ar:factId>maven-­‐compiler-­‐plugin</ar:factId>
<version>3.1</version>
<configura:on>
<source>1.8</source>
<target>1.8</target>
<encoding>uU-­‐8</encoding>
</configura:on>
</plugin>
<plugin>
<groupId>org.eclipse.jeVy</groupId>
<ar:factId>jeVy-­‐maven-­‐plugin</ar:factId>
<version>9.2.6.v20141205</version>
<configura:on>
<webApp>
<contextPath>/</contextPath>
</webApp>
<scanIntervalSeconds>3</scanIntervalSeconds>
</configura:on>
</plugin>
</plugins>
</build>
3

4. Boot 이전의 설정: 스프링
@EnableJpaRepositories(basePackages
=
"domain")
@EnableWebMvc
@EnableTransac:onManagement
@ComponentScan(basePackages
=
"controller")
public
class
Config
extends
WebMvcConfigurerAdapter
{
@Override
public
void
configureDefaultServletHandling(DefaultServletHandlerConfigurer
configurer)
{
configurer.enable();
}
@Override
public
void
configureViewResolvers(ViewResolverRegistry
registry)
{
registry.jsp().prefix("/WEB-­‐INF/view/");
}
@Bean
public
LocalContainerEn:tyManagerFactoryBean
en:tyManagerFactory()
{
LocalContainerEn:tyManagerFactoryBean
emf
=
new
LocalContainerEn:tyManagerFactoryBean();
emf.setPackagesToScan("domain");
emf.setDataSource(dataSource());
HibernateJpaVendorAdapter
adapter
=
new
HibernateJpaVendorAdapter();
adapter.setDatabase(Database.MYSQL);
adapter.setShowSql(true);
emf.setJpaVendorAdapter(adapter);
return
emf;
}
@Bean
public
DataSource
dataSource()
{
ComboPooledDataSource
ds
=
new
ComboPooledDataSource();
try
{
ds.setDriverClass("com.mysql.jdbc.Driver");
}
catch
(PropertyVetoExcep:on
e)
{
throw
new
Run:meExcep:on(e);
}
ds.setJdbcUrl("jdbc:mysql://localhost/test?characterEncoding=uU8");
ds.setUser("root");
return
ds;
}
@Bean
public
PlaUormTransac:onManager
transac:onManager(En:tyManagerFactory
emf)
{
JpaTransac:onManager
tm
=
new
JpaTransac:onManager();
tm.setEn:tyManagerFactory(emf);
return
tm;
}
}
4

5. Boot 이전의 설정: web.xml
<?xml
version="1.0"
encoding="UTF-­‐8"?>
<web-­‐app
xmlns:xsi="hVp://www.w3.org/2001/XMLSchema-­‐instance"
xmlns="hVp://java.sun.com/xml/ns/javaee"
xsi:schemaLoca:on="hVp://java.sun.com/xml/ns/javaee
hVp://java.sun.com/xml/ns/javaee/web-­‐app_3_0.xsd"
version="3.0">
<servlet>
<servlet-­‐name>dispatcher</servlet-­‐name>
<servlet-­‐class>
org.springframework.web.servlet.DispatcherServlet
</servlet-­‐class>
<init-­‐param>
<param-­‐name>contextClass</param-­‐name>
<param-­‐value>
org.springframework.web.context.support.Annota:onConfigWebApplica:onContext
</param-­‐value>
</init-­‐param>
<init-­‐param>
<param-­‐name>contextConfigLoca:on</param-­‐name>
<param-­‐value>config.Config</param-­‐value>
</init-­‐param>
<load-­‐on-­‐startup>1</load-­‐on-­‐startup>
</servlet>
<servlet-­‐mapping>
<servlet-­‐name>dispatcher</servlet-­‐name>
<url-­‐paVern>/</url-­‐paVern>
</servlet-­‐mapping>
<filter>
<filter-­‐name>encodingFilter</filter-­‐name>
<filter-­‐class>org.springframework.web.filter.CharacterEncodingFilter</filter-­‐class>
<init-­‐param>
<param-­‐name>encoding</param-­‐name>
<param-­‐value>UTF-­‐8</param-­‐value>
</init-­‐param>
</filter>
<filter-­‐mapping>
<filter-­‐name>encodingFilter</filter-­‐name>
<url-­‐paVern>/*</url-­‐paVern>
</filter-­‐mapping>
</web-­‐app>
5

6. 프로젝트 설정 작업
• 따분하고 지루하고 실수하기 딱 좋은 과정
– 의존 모듈 간 버전 맞추기
– (다른 소스에서) 설정 C&P하고 수정
– 잘 되나 테스트
– 빌드와 실행
6

7. Boot
• 최소한의 노력으로 스프링 기반 프로젝트를
시작할 수 있도록 도와줌
– 스프링 및 연동 기술의 표준화된 버전 설정
– 설정 최소화 : 기술별 표준화된 설정 모음 제공
– 임베디드 서버, 보안, 모니터링 구현 지원
7

8. Boot 이후: 설정
<parent>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐parent</ar:factId>
<version>1.2.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐web</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐data-­‐jpa</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐test</ar:factId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<ar:factId>mysql-­‐connector-­‐java</ar:factId>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<ar:factId>jstl</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐tomcat</ar:factId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<ar:factId>tomcat-­‐embed-­‐jasper</ar:factId>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐maven-­‐plugin</ar:factId>
</plugin>
</plugins>
</build>
@SpringBootApplica:on
public
class
Applica:on
{
public
sta:c
void
main(String[]
args)
{
SpringApplica:on.run(Applica:on.class,
args);
}
}
spring.view.prefix:
/WEB-­‐INF/view/
spring.view.suffix:
.jsp
spring.datasource.url=jdbc:mysql://localhost/test?characterEncoding=uU8
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver=com.mysql.jdbc.Driver
spring.jpa.database=MYSQL
8

9. 이전과 이후 비교
9

10. Boot가 해 준 것 1, 모듈 설정
<parent>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐parent</ar:factId>
<version>1.2.0.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐web</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐data-­‐jpa</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐test</ar:factId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐tomcat</ar:factId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat.embed</groupId>
<ar:factId>tomcat-­‐embed-­‐jasper</ar:factId>
<scope>provided</scope>
</dependency>
</dependencies>
표준 버전 모음
spring-­‐mvc 등 웹 관련 모듈 자동 설정
spring-­‐data-­‐jpa,
JPA,
Hibernate 관련 모듈 설정
연관된 spring-­‐orm,
커넥션 풀 등 모듈 설정
spring-­‐test,
JUnit
등 관련 모듈 설정
임베디드 톰캣 관련 모듈 설정
10

11. 모듈 구성
11

12. Boot가 해 준 것 2, 스프링 설정
@SpringBootApplica7on
public
class
Applica:on
{
public
sta:c
void
main(String[]
args)
{
SpringApplica7on.run(Applica:on.class,
args);
}
}
//
@SpringBootApplica:on은 다음과 동일
//
@Configura:on
//
@EnableAutoConfigura7on
//
@ComponentScan
모든 설정 자동 생성!
- 스프링 MVC
-­‐
DataSource
-­‐
JPA,
JPA
TX,
Spring
Data
JPA
-­‐
DispatcherServlet,
CharacterEncodingFilter
spring.view.prefix:
/WEB-­‐INF/view/
spring.view.suffix:
.jsp
spring.datasource.url=jdbc:mysql://localhost/test?...
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver=com.mysql.jdbc.Driver
spring.jpa.database=MYSQL
JSP용 ViewResolver 설정
DataSource
설정
JPA 설정
12

13. @EnableAutoConfiguration
@EnableAutoConfigura:on
@JpaRepositoriesAutoConfigura:on
@HibernateJpaAutoConfigura:on
@EmbeddedServletContainerAutoConfigura:on
@WebMvcAutoConfigura:on
@DataSourceAutoConfigura:on
@OOOOAutoConfigura:on
들
각 AutoConfigura:on은 조건에 따라 기본 설정 생성
13

14. Boot가 해 준 것 3, 서버 실행
• 임베디드 톰캣으로 실행
– mvn spring-boot:run
...
[INFO]
-­‐-­‐-­‐
spring-­‐boot-­‐maven-­‐plugin:1.2.0.RELEASE:run
(default-­‐cli)
@
bootVersion
-­‐-­‐-­‐
...
10:11:57.394
[app.Applica:on.main()]
INFO
app.Applica:on
-­‐
Star:ng
Applica:on
on
MADVIRUSui-­‐MacBook-­‐Air.local
with
PID
15134
(...)
...
...
10:11:59.947
[app.Applica:on.main()]
INFO
o.s.b.c.e.t.TomcatEmbeddedServletContainer
-­‐
Tomcat
ini:alized
with
port(s):
8080/hVp
10:12:00.219
[app.Applica:on.main()]
INFO
o.a.catalina.core.StandardService
-­‐
Star7ng
service
Tomcat
10:12:00.221
[app.Applica:on.main()]
INFO
o.a.catalina.core.StandardEngine
-­‐
Star7ng
Servlet
Engine:
Apache
Tomcat/8.0.15
...
...
10:12:05.708
[app.Applica:on.main()]
INFO
o.s.b.c.e.t.TomcatEmbeddedServletContainer
-­‐
Tomcat
started
on
port(s):
8080/hIp
10:12:05.712
[app.Applica:on.main()]
INFO
app.Applica:on
-­‐
Started
Applica:on
in
8.702
seconds
(JVM
running
for
12.428)
14

15. Boot가 해 준 것 4, 실행 가능 war 생성
• 패키징한 war를 java 명령어로 실행 가능
– mvn package
– java -jar target/myapp.war
• 임베디드 톰캣으로 실행
• 생성된 war를 일반 WAS에 배포해도 됨
• war가 아닌 jar 타입으로도 가능
15

16. 다양한 기능에 대한 자동 설정 지원
16

17. 운영지원 기능 : Actuator
• 서비스 상태(Health), 계측(Metric) 등 서비스
운영 지원을 위한 정보 제공 기능
• 다음 의존 추가로 자동 활성화
• 예, /health
<dependency>
<groupId>org.springframework.boot</groupId>
<ar:factId>spring-­‐boot-­‐starter-­‐actuator</ar:factId>
</dependency>
17

18. Actuator가 제공하는 정보
• env : 스프링 Environment의 프로퍼티 목록
• health : 어플리케이션 Health 상태 정보
• metrics : 계측 정보
• mappings : 웹 경로 매핑 정보
• dump : 쓰레드 덤프
• beans : 빈 목록 정보
• trace : 최근 HTTP 요청 목록 표시(100개)
18

19. 기타
• Remote Shell 기능 (Telnet로 연결해서 관리)
• 기본 로깅 설정 제공
• NoSQL 지원 (Redis, MongoDB, Solr 등)
• WebSocket 설정 지원
• JTA 설정 지원 (Atomikos, Bitronix)
• Maven과 Gradle 지원
19

20. 참고자료
• Spring Boot 프로젝트
– http://projects.spring.io/spring-boot/
• 레퍼런스 문서가 좋음
• 도서: Learning Spring Boot
– http://goo.gl/Awzzoz
• Gradle 기반
• 현재 버전에 맞게 코드를 수정해야 할 부분이 간혹 있
지만 감을 잡기에 충분한 지식 제공
20